theory Ex imports PurebeginML {* val rc = Isabelle_System.bash "cd \"$ISABELLE_HOME/src/HOL/Library\"; \"$ISABELLE_TOOL\" mirabelle -q arith Inner_Product.thy"; if rc <> 0 then error ("Mirabelle example failed: " ^ string_of_int rc) else ();*} -- "some arbitrary small test case"end